Base-fuse for explosive projectiles.



Patented Apr. 22, I902.

c. M.- BRODERICK.

BASE FUSE FDR EXPITOSIVE PROJECTIL ES.

(Application med. June 19, 1901.)

(No Model.)

' mally held back by a fastening and is thrown UNITED 7 STATE-s PATENT OFFICE.

CLEMENT M. BRODERICK, or WINDSOR, oonnno riou'r.

BASE-FUSE FOR EXPLOSIVE PROJECTILES ECIEICATION forming part of Letters Patent No. 697,974, datedApril 22, 1902.

Application filed June 19, 1901. Serial No.65,131. (No model.) a

To all whom it may concern..-

Be it known that LOLE'MENT M. BRODERICK, a citizen of the United States, residing at \Vindsor, in the county of Hartford and State of Connecticut,have invented certain new and useful Improvements in Base-Fuses for Explosive'Projectiles, of which the following is a specification.

This invention relates. to those base-fuses for shells which have a plunger. that is norforward by its momentum with sufficient power to break the hold of the fastening and strike the primer with enough foroeto explode it at the impact of the shell.

The object of the invention is to provide a simple and strong base-fuse of this nature which may be easily constructed and which will be sure in action, and yet safe from accidental discharge.

The embodiment of the invention that is illustrated by the accompanying drawings has a hollow body with an end closed by a primer-cap, and in the body is a movable sleeve, a plunger bearing a firing-pin within the sleeve, and a split ring arranged to fasten the sleeve and the plunger together when the shell is projected from the gun.

Figure 1 of the views shows a longitudinal diametrical section of the base-fuse, and Fig.

the body may be crimped over for holding the cap in place. The primer 7 is located in a cavity in the cap at the rear end of the flash-perforation 8. A sleeve 9 loosely fits within the cylindrical bore of the body and is movable between the solid head and the cap. Loosely fitting the opening in the sleeve is a plunger ,10. At the forward end of the plunger is a firing-pin 11.' The rear portion of the opening through the sleeve is somewhat larger than the diameter ofthe part of the plunger that fits in the sleeve. In the enlarged portion of the opening through the sleeve is a split ring 12. This ring closely encircles the plunger just in frontof the enlarged part 13, in which is the annular groove 14. The front wall of the shoulder in front of the annular groove is inclined so that when the sleeve is drawn t ively light plunger from being thrown forwardly and striking the primer. When the shell is fired, the inertia of the sleeve as the shell is projected causes the sleeve to force back the ring and to occupy the rear end of the chamber in the body. Inthis position the ring holds the sleeve and plunger together, so that when the shell strikes the' plunger under its own momentum and reinforced by the momentum of the sleeve is thrown forward,

so that the firing-pin will strike and explode the primer, and thus cause the shell to burst. This base-fuse is simple to construct, it is sure in action, for the'cap containing the primer cannot loosen from the end of the body, and the combined weights of the plun ger and sleeve will cause the explosion of the primer, and it is very safe, for the plungercannot engage the primer until the sleeve has been forcibly thrown backward, and this can only be accomplished by the violent pro} jection forward of the shell.

I claim as my invention 1. A base-fuse for a projectile consisting of a hollow body closed at one end by a primer cap and containing a movable sleeve with an interior groove, a movable plunger with an exterior groove, and a yielding ring arranged to normally prevent the relative longitudinal movement of the ,plunger and sleeve and to be forced into the two grooves so as to lock the sleeve and plunger together by the backward movement of the sleeve, substantially as specified.

2. A base-fuse for projectiles consisting of a hollow body closed at one end by a primercap and containing a movable sleeve, a movable plunger having sect-ions of two difierent diameters with an exterior groove in the section having the larger diameter, and a yielding ring loosely located in a recess in the sleeve about the reduced part of the plunger so, as to prevent the forward movement of the plunger until the sleeve is forced back wardly and forces the ring into the groove in, the plunger and locks the plunger and sleeve together, substantially as specified.

A base-fuse for projectiles consisting of a hollow body having a threaded exterior, a flanged head and a primer-cap closing one end, and containing a movable sleeve, a plunger With an exterior groove and a firing-pin, movable in the sleeve, and a yielding ring loosely located ina recess in the sleeve about a reduced part of the plunger so as to prevent the forward movement of the plunger until the sleeve is forced backwardly and forces the ring into the groove in the plunger and locks the plunger and the sleeve together,

substantially as specified.

4, A base-fuse for projectiles consisting of a hollow body having a threaded exterior, a flanged head, a primer-cap which occupies one end and is held in place by crimping the end of the body over the edge of the cap, said body containinga movable sleeve, a pl unger with a firing-pin movable in the sleeve, an annular groove in the plunger, and a yielding ring loosely located in a recess in the sleeve about a reduced part of the plunger and adapted to be forced into the groove in the plunger and expanded into the recess in the sleeve by the backward movement of the sleeve so as to lock the sleeve and plunger together, substantially as specified.

CLEMENT M. BRODERICK.

"Wi tn esses HENRY A. WoLcoT'r, EDWARD M. STONE. 

